code: def secondsPast(self, frame, jd):
      t = self
      if frame != self._frame:
          t = self.convert(frame)
  
      delta = t._jd - jd
      return t._seconds + delta * 86400
  
file_path: catboost/contrib/python/matplotlib/py3/matplotlib/testing/jpl_units/Epoch.py
imports: import functools
  import operator
  import math
  import datetime
  from matplotlib import _api
  from matplotlib.dates import date2num
label_desc: Use image node_id 5 for calling the Epoch obj's underlying member method code with example usage: obj.secondsPast(frame, jd) and returns: unknown